Device for cutting tubes



Nov. 13, 1928.

E. BURKE ET AL DEVICE FOR CUTTING TUBES 2 Sheets-Sheet 1 @s gm l?? maggy p M Filed oct. 1 1, m23

Nov. 13, 1928.

E. BURKE ET AL DEVICE FO'R CUTTING TUBES Filed oct. 4, 1925 2 sheets-sheet 2 Patented New-13, 1928.

EDMUNDBURKE AND CHARLES QUINCY IvEs, OE POETLAND, MAINE, AssIGNoRs To BROWN COMPANY, or BERLIN,Y NEW HAMPSHIRE, A CORPORATION OE MAINE.

DEVICE EOE CUTTING TUBES.

Thisinvention relates to devices for cutting in scarf or other formation the ends'of' tubes or pipes, and has lbeen more especially designed, though not restricted to such use, to operate on non-metallic tubes, such for example as those formed from paper Vpulp treated with hardening and liquid-proofing agents. Y' Thedevice'of this invention is easily portable lso that it may be used. where such tubes or pipes are being installed.I for the purpose of forming their ends to the desiredcongurations for joining them' end to end "or for other purposes, A

The device, therefore, comprises a mem ber engageable with the pipe to beV cut and mechanism carried thereby which may be aotuated'to perform the cutting operation. -j

For a more complete understanding oftliis invention, referencemay be had to the accompanying drawings in `which Figure 1 is ay side elevation of the device. Figures 2', 3 and 4 are detail sections on lines 2- 2, 3,- 3 and 4 4, respectively, of

' Figure 1. 1

VFigurey 5 is an endview of a scarling knife. Figures 6 and 7 are fragmentary views showing formations ofV scarfs for mating sparende .f

Figure 8 is a view similar to a portionof Figure 1, butA illustrating a modified yform of pipe-,engagingand holding means.

Figure 9 is a detail section'on line 9 9 lof VFigure 8.

Figure lated parts. v .y

Figures11, 12 and 13 are fragmentary elevations similar to a' portion of Figure l, but illustrating various tools and 'correspondingiconfigurations of tube ends. i

` Figure 14 is a detail section through'tlne fis a detail section y*through the; tool-feeding and supportingY shaft and re Application led October 4, 1923. lSerial No. 666,462f

which may be expanded intoA close Contact with the .innerwall of the-pipe or tube to be cutA so that the sleeve Vand rod' are arranged coaxial'ly therewith lin position to support the cutting devices as will later api pear. Suc-hexpanding clamping meansv comprises'a vcollar 3 fixed'to the inner end of the sleeve 1 and a similar-collar4 fixed tor the inner end of the rod 2,v both these collars being formed with radially extending forked ljaws `5 between which are pivoted the ends of arms 6 and 7*. The outer ends of these armsareconnectedin pairs, 'each'arm G being connected to thel corresponding arm 7 by linksrpivoted vwat oppositel ends to these arms and forming a toggle therewith. As shown four such links 8 are employed but more or less could be used. "as desired, three Abeing the minimuml forA best results. The links y8 are normally urged outwardly from the rod 2, resilient leafzsprings '9 interposed between the inner edges of these links and the rod `2Vbeing Ishown as employed for that purpose. Itis evident that by moving kthe 'rod 2f-outwardly, causingthe collar 4 to approachthe' eollar, thelinks 8 are forcedy outwardly, and'that inward motion of the vrod 2 relative to "thesleeve 1 causes the collair 4to'moVe-away from the-'collar 3 and re.- `tracts'the'ylinks 8 untiltheyare'in aline.` ment with-the Gland '7L vMotion of `the rod 2 relative to the sleeve 1 maybe effected 'by turning a nutlO threadedjon anexter- -nally threaded'portion ll'thfereof and ro-` tatable on the outer end. of thev sleeve 1.V As shown this nut 10 has.outwardlyextending postsor pins 12 which maybe grasped to 'facilitate' turning of the nut,` these .posts or pins, as shown best in FigurelO, extending intoa circumferential groove v'13 in the pei ripheryof the sleeve-1 adj'acentits outer end. By this means thenutis retained against axial movement relative to thev sleeve. By

manipulation of Atlie'nut 10, therefore.' the" sleeve andf'rod may .be'clampedin vaxial relation to thepipe lorV tube, the links 8 being expanded into Clamping engagement with the innerwallsthereofY when vit is desired tot retain `the'jsleeve andfrod into position and being retracted therefrom when itfis desired Y i to remove` the dev ieejfrom, the pipe. The

outerV end of the rodl .2fr may be :provided with aghandleQO to facilitate thevinsertin andwithdrawal from they ktubeof the clampto hold the tools stationary axially thereof while permitting them to be rotated to carry them about the periphery of the work. In order that these two actions may take place at will, the outer end of the sleeve, as at 25, is threaded, and Vin engagement with the Vthreads thereof is an internally threaded CII block 26.' Inwardly from the portion 25 the Y sleeve l has an unthreaded portion 27 which is of suliicient length up tothe sleeve Sto permit the blo-'3k 26 to be rotated freely thereon. This construction also acts as an automatic stop for a scarfing tool as `the end of the tube to be operated on can be set with respect to the smooth portion 27 so that the cutter will be fed along the tube to a certain pointat which it will cease to advance, this cessation taking place when the block 26 moves off the'threaded portion 25 and on to the smooth portion 27 of the sleeve l. Vhen thisV block is in position to ride on` the threaded portion 25, rotation thereof, of course, imparts a traverse thereof lengthwise of the sleeve, but when it rotates on the portion 27 it is not traversed. This block 2G may have fixed thereto one or moreradially extending `bars 30,which may, if desired, be provided with handlesvl attheir ends to facilitatethe turning of the bars and the block 26 about :the centerof the sleeve l as an axis. Adjustable lengthwise of each bar 30 is a tool Vcarrier 32, which, as shown more particularl in Figure 2, may comprise a split sleeve` vv` ich Vmay be tightened on the corresponding bar when in` proper adjusted position by means .of a clamping screw 38. This collar is provided with a keyway 34. within which rides a long keyV SeXtending lengthwise of the corre-f spending bai" 30 which acts toretaiii the tool holder from rotationrelative to the bar. F iXed to r integral with the sleeve 32 is an arm 32 having on oppositfevf'aces a cutout portion 36 which forms a, seat for a cutting tool 37.

As shown best. Vin Figures l` and the cuttingtoolBTinay comprise a blade having a. beveled cutting edge as at 38 and provided with a pair of slots`39 through which may pass screws 40 by whieh the knife may be fixed in position in either of the cutout portions 36. The two cutout portions are pro- ,Y vided to avoid the necessity 'of forming right and left hand holders for operating on opposite sides of the central a'Xi's of the pipe, for work of thiskind it beingfound advisvable to Vhave the knives trail and act with a scrapin g effect rather thanv by direct cutting.

The knives are therefore set on their holders in a manner to give the desired bearing thereof on the work, depending on the direction of rotation which it isV desiredto impart thereto by manipulationV of the handles 3l. It will be noted also` 'from an inspection of Figure l that the tools on oppositel sides of the axis 'of the sleeve face in opposite directions, being .placed on relative opposite sides of their respective tool holders. While .a pair of tool holders has been showinit is` evident that more or less than 4two might be employed if desired.

`ieans are provided by which the tool holders may be nioved simultaneously and equally toward and from the axis of a tube in order to providefor various diameters of tube and also to elfect inward feed movement ofthe knives after they have begun toV operate on the tube. `For this .purpose each. of the tool carriers has preferably integral with the sleeve portion 32, an arm threaded to receive an adjusting screw or threaded rod 46. his screw is oppositely threaded at opposite ends and is journaied at its'central `iortio'n in an 4extension /l jof the block 26. y turning this screw, therefore, it is evident that the tool carriers will be movedV toward` 26 by means of a screw49 threaded in the,A

upper end of the portion 47 and provided at its innei` end with a pin portion 50 engaging in a circumferential grooveY 5l in the rod.

By the use of suitably formed tools the endsof the pipesmay vbe scarfedas shown in Figures 6 and 7, the end of one tube, as in Figure 6, being tapered externally as shownl at andthe innerV face of the adjacent tubebeing complementally tapered as at 6l in VFigure 7 vLikewise as shown in Figures ll, l2 and, 14 the en'dfofone tube may be formed with an externally stepped end V(32 and the mating pipe may Vbe formed with a complementally internally stepped endas shown at G3, the position ofthe tools for cuttingthese portions being shown in Figureslland 12..V y c c In Figure 13 is shown a forni of tool which may be usedA when it is desired to cut olf the end of the pipe,`this tool, as shown, having a lpoint which may be caused to score the wall of the pipe or tube and be fed tliereacross by an axial feed of Vthe Vknife by turning theV threaded rod `46,

VIn. Figures y8 Yand 9 VVa slightlyinodilied form of clamping means is disclosed in llO which the links 8 are provided with curved plates 75 which may bear against the inner face of the tube, these plates being pre'fen ably of resilient4 material slightly flatter than the arc of the surface With which they are to contact so that they' may engage thisl surface over their entire Widths when .thev

links 8 are fully expanded.

Having thus described certain einbodif length threaded, an internally threaded, block engageable With the threads of said member and operatively rotatable `on both its threaded and unthreaded portions to advance or not to advance along said member While operating on the Work according as the block is rotated on the threaded or unthreaded portion of the member, bars ex tending. from said block, a. tool carrier adjustable axially 0f each bar, andv means for attaching said member axially of a tube to be operated upon by tools held by said carriers. i v

2. A device of the class described comprising a sleeve having a portion of its length threaded,` an internally threadedV block engageable with the threads of said sleeve and, operatively rotatable on both its threaded and unthreaded portions, bars extending from said block, a tool carrier adjustable axially of each bar, means for attachingrsaid sleeve axially of a tube` to be operated upon by tools held by said carriers, and an element extending through said sleeve for actuating said attaching means.

3. A device of the class described coniprising a sleeve, a rod slidable through said sleeve, arms pivoted to the adjacent ends of said sleeve and rod, links connecting the tree end oieach sleeve arm With the free end of a rod arm, whereby said links are moved in unison from and toward the axis Vof said sleeve Vand rod to engage and disn engage the inner Wall of a tube in Which said links are placed, the opposite end ,of -said rod being threaded, a nut engaging the +threads of said rods and rotatable on said sleeve in fixed longitudinal relation thereto,

wherebyt'he rotation of said nut acts toV move said links, anda tool rotatably supported on .said sleeve in position to operate kon the tube. t In testimony whereof We have affixed our signatures.

EDMUND BURKE. Y CHARLES QUINCY IVES. 

